Telephone-switch



(No H odel.)

B. T. GILLILAND. Telephone Switch.

No. 242,195. Patented May 31,1881.

O UNITED STATES,

PATENT OFFICE.

EZRA T. GILLILAND, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE AMERI- CAN BELL TELEPHONE COMPANY, OF BOSTON, MASSACHUSETTS.

dlI

SPECIFICATION forming part of Letters Patent No. 242,195, dated May 31, 1881.

Application filed November 16, 1880. (No model.)

To all whom it may concern Be it known that I, EZRA 'l. GILLILAND, of the city of Indianapolis, county of Marion, and State of Indiana, haveinvented certain new and useful Improvements in Telephone-Switches, of which the following is a specification.

The object of my said invention is to provide means whereby the telephone, when hnn g up, may establish such an electrical circuit as will cut out both the telephone itself and the transmitter, or by a variation in the construc tion the telephone only, all as will hereinafter be more particularly described.

Referring to the accompanying drawings, Figure 1 is aperspective view of so much of a telephone and a transmitter and their connections as is necessary to illustrate my invention, the telephone being removed from the hook on which it is to be hung when not in use; Fig. 2, a similar view to Fig. 1, except that the telephone is hung up. Fig. 3 illustrates a variation in the construction of the means for electrically connecting the bindingpost of the telephone and the hook on which it is hung; and Fig. 4, a still further variation, wherein the binding-posts themselves are 1 so constructed as to serve as the hook by which thetelephone is hung on the wall hook or pin.

In said drawin 51s, the portions markedArepresent the transmitter; B, the telephone; G

O, the binding-posts of the telephone; D, a hook or eye on the telephone, by which it is hung up; E, a metallic strip, by which one of the binding-posts, O, and said eye are electrically connected; F, a hook or pin on the wall or bell-box, on which the telephone is hung when not in use; G, the incoming line-wire to the telephone; H, the outgoing line'wire from the telephone, which is also, in the arrangementshown,theincomingline-Wire tothetrans. mitter; I, the outgoing line-wirefrom the tran mitter; J ,a wire connecting the wire I with the hook F, and K K the wires connecting the t ansmitter with the battery.

The operation of my'invention is as follows: When, asin Fig. 1, the telephone is removed from the hook, all the connections serve their ordinary purposes. When, however, the telephone is hung up, as shown in Fig. 2, the elec- 5o trical current coming in over the wire G passes through the binding-post O, the strip E, the eye D, the hook F, and the wire J to the outgoing line-wire I, thus completely cutting out both the telephone and the transmitter from 55 the circuit.

In the form shown in Fig. 3 the metallic band D and strip E are the equivalents of the eye D and strip E in Figs. 1 and 2, and the hook F (which is bifurcated to accommodate the other changes in construction, and bears against the ring D in supporting the telephone) is the equivalent of the hook F in said figures.

In the form shown in Fig. 4 curved binding- 6 5 posts. 0 .0 coming nearly together at the top, serve the same purpose as the eye D in suspending the telephone. When the connections herein described are all employed the result of using this form of construction is the same as that accruing from the use of the other forms which have been mentioned. When,however, the wire J is removed, or no transmitter is employed, the result is to cut out the telephone separately when the same is hung up, the ourrent passing directly from one binding-post to the other through the pin F Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l.- A telephone apparatus comprising, in combination with a telephone and its support, one or more contact-pieces carried by the telephone and electrical connections, as indicated, whereby, when the telephone is on its sup- 8 5 port, the current passes through thelatter without passing through the telephone, substantially as described.

2.- The combination of a telephone, an eye or equivalent device carried by the telephone and electrically connected with one or both the binding-posts, and a supporting hook or pin, substantially as described.

3. The combination of an electrical circuit,

a transmitter, a hand-telephone, asupport for 9 5 the hand-telephone, a contact-piece carried by the telephone, and electrical connections, substantially as described, whereby the hanging of said telephone on its support cuts both ithand and seal, at Indianapolis, Indiana, this self and the transmitter out of the circuit, as 12th day of November, A. D. 1880. set forth.

4 :v 4. A telephone provided with an eye or DZhA GILLILAND' 5 equivalent device electrically connected with Witnesses:

one or both binding-posts, as set forth. LILLIE GILLILAND,

In witness whereof I have hereunto set my 0. BRADFORD. 

